摘要：
Given an array where elements are sorted in ascending order, convert it to a height balanced BST./** * Definition for binary tree * public class TreeN... 阅读全文
摘要：
Given a binary tree, flatten it to a linked list in-place.For example,Given 1 / \ 2 5 / \ \ 3 4 6The flattened t... 阅读全文
摘要：
Given a binary tree, imagine yourself standing on therightside of it, return the values of the nodes you can see ordered from top to bottom.For exampl... 阅读全文